D3VE A2A heads
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D3VE A2A heads

  1. #1
    Member lotsofink02's Avatar
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    Default D3VE A2A heads

    Are these any good or junk?I had the motor rebuilt earlier this year and am happy with the way it runs and performs with the exception of the carb being too small.Feels like if the fuel was there it would run a little faster on the big end.This by all means is not a race boat and like I say I like the way it runs.Has been very dependable.We go out on it nearly every weekend.Just curious as to whether the heads are good ones.Thanks

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  3. #2
    Senior Member EVILFORCE's Avatar
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    No. It is about the worst factory head to have. They can be reworked.
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  4. #3
    Member lotsofink02's Avatar
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    Quote Originally Posted by EVILFORCE View Post
    No. It is about the worst factory head to have. They can be reworked.
    Ok thanks.I'll start looking for better ones.Recommendations?I'm just lookin to improve,not racing it.But if theses are pretty much junk,then I want to upgrade to non junk.

  5. #4
    tintingsandiego krusn56's Avatar
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    http://www.reincarnation-automotive....s-1-index.html
    The d2ve-a2a is the worst to have on this list....The d3ve can have port work to make better flow. I also found this on craigs in SD. http://sandiego.craigslist.org/csd/pts/2025125617.html
    One of my friends on this site runs a 521 BBF stroker with d3ve-a2a heads. Not sure on exact size motor but close....
    I also have d3ve-a2a heads without port work in a 18' cruiser and they are fine.
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  6. #5
    www.highflowdynamics.com LakesOnly's Avatar
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    Quote Originally Posted by lotsofink02 View Post
    Are these any good or junk? I had the motor rebuilt earlier this year and am happy with the way it runs and performs with the exception of the carb being too small. Feels like if the fuel was there it would run a little faster on the big end.This by all means is not a race boat and like I say I like the way it runs.Has been very dependable.We go out on it nearly every weekend.Just curious as to whether the heads are good ones.Thanks
    D3VE-A2A heads were released for 1973 model year 429/460 engines. They are a lower compression closed chamber head as far as 460's go, but with a flat top piston they still make a healthy 9.6:1 compression ratio at 0.030" overbore.

    Ford used to have a smaller closed chamber design, the C8VE/C9VE/D0VE heads (referred to as the "early-style" heads). When tighter emissions regulations came to be, Ford answered with the D2VE-AA head for the 1972 model year. The D2VE head is an open chamber head which proved to be so detonation prone that they quickly ditched it after a single model year and then came out with the closed chamber D3VE head. In short, Ford reverted back to the closed chamber design of the early-style heads, but sunk the chamber 0.100" deeper into the cylinder head thereby making it a low compresison closed chamber head.

    Because it was released in 1973, the D3VE-A2A is often referred to as a "smogger head." But the potential of these heads have since been unlocked and in the right combinations they can be a fine cylinder head for lake boats. I run ported D3VE's and my 18-ft jet boat manages 85 mph. Once ported, D3VE's are perfectly suitable for ~400 hp pump gas engines....and with some valve train modifications they can support a couple hundred horsepower more than that.

    You are correct that the OEM 460 needs a bigger carburetor. In bone stock trim, I feel that a Holley 850 cfm is the minimum in a jet boat application because of the upper rpm range that the engine regularly will operate. That being said, the D3VE heads have an as-cast exhaust port design which begins to "back up" above 4000 rpm and porting the exhaust helps measurably in even the mildest of performance builds.

    ...not an ultra-high performance head, but they are certainly worthy in the right engine combos.

    LO
    Last edited by LakesOnly; 10-26-2010 at 12:09 PM.
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    This post © Copyright 2007-2014 Paul Kane. No copying, linking, printing or otherwise without express written permission.

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    Senior Member rogerroost's Avatar
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    Senior Member rogerroost's Avatar
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    I wish these were in my buget!

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